Overview. Caffeine is a chemical primarily found in coffee and tea, but which also appears in various sodas, sports drinks and foods. It is a stimulant, therefore causing changes in metabolism as well as increases in focus and energy. Caffeine is addictive and can cause withdrawal following cessation after frequent use.
robot. 1  a machine that resembles a human and does mechanical, routine tasks on command. 2  a person who acts and responds in a mechanical, routine manner, usually subject to another's will; automaton. 3  any machine or mechanical device that operates automatically with humanlike skill.
Robotics is a rapidly growing field that has applications in diverse industries. A robotics engineer designs robots, maintains robots, develops new applications for robots, and conducts research to expand the potential for robots. Robots can be used in a variety of industries, including manufacturing, agriculture, aerospace, mining, and medicine.